It's not hard to fall for someone like Junghwan, who is more known as Sandeul. In fact, it's fairly easy. He was cute, adorable, somewhat shy, and had an amazing personality. Overall, he is a likeable person. 

Hakyung has always been best friends with Lee Junghwan and Cha Soojung. To her, there is no such person as Sandeul. He will always be little old Lee Junghwan. She could never admit face-to-face, but she had fallen for him just like Soojung. They were friends since they were all just five years old. Now, they are seniors in high school.

Not all crushes last. People change and feelings change.

At least most of them.